Uh... The story is about poker vs casino. Like there "Russian poker" or "oasis poker". Not about blackjack. There is no point in bothering like that in blackjack. And shoes in blackjack have been used for a long time and came to the Russian Federation along with the game in 1989.
But spying on the cards of the croupier in poker (which is clearly stated in the article - by the way, where is the source?) - this is a plus cheating that has been used and, perhaps, is still used all over the world.
The camera can be built into a lighter, and into a pack of cigarettes, and into anything, that the MAIN thing is on the table! When the casinos figured out this topic, they banned everything on the table... except... CHIPS! Well, how to forbid chips to hold? It was then that a way was invented to hide the camera in a type of stack (stack) of chips. But, of course, not the chips themselves. A plastic layout was made, resembling a stack, maybe one real chip was glued on top, ONLY the illusion was created that these were all real chips. And that's how the camera worked. When this topic was also explored, another one appeared ... I won’t say which one. You never know...
Z.Y. Cool blog, write more if we fix something. Gee-gee.